Fix make_readme on Python 2

devscripts/make_readme.py

@@ -5,6 +5,9 @@ import re
 README_FILE = 'README.md'
 helptext = sys.stdin.read()
 
+if isinstance(helptext, bytes):
+    helptext = helptext.decode('utf-8')
+
 with io.open(README_FILE, encoding='utf-8') as f:
     oldreadme = f.read()